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Ultimate Funfetti Birthday Cake


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  • Author: Amelia
  • Total Time: ~2 hours (including cooling and optional chilling)
  • Yield: 12–16 slices

Description

A tall, homemade confetti‑speckled vanilla cake with moist, fluffy layers loaded with rainbow sprinkles, lavishly frosted in tangy cream cheese icing and finished with extra sprinkles for maximum celebration flair.


Ingredients

For the Funfetti Cake Layers:

2 2/3 cups cake flour (about 330 g)

1 Tbsp baking powder

½ tsp baking soda

¾ tsp salt

1 cup (8 oz) unsalted butter, softened

1½ cups granulated sugar (about 298 g)

6 large egg whites (about 201 g), room temperature, beaten until very frothy

¾ cup whole milk, room temperature

¾ cup sour cream, room temperature

¼ cup oil (canola or vegetable)

1 Tbsp vanilla extract

½ cup rainbow sprinkles, plus extra for decorating

For the Cream Cheese Frosting:

3 cups cream cheese (about 706 g), very soft

¾ cup unsalted butter (about 170 g), very soft

4 cups confectioners’ sugar, sifted (about 454 g)

¼ tsp salt

2 Tbsp milk, more if needed

Nonpareil sprinkles for decorating (optional) 


Instructions

Preheat oven to 350 °F (175 °C). Grease two 9″ round cake pans and line bottoms with parchment.

Whisk together flour, baking powder, baking soda, and salt; set aside.

Beat butter until creamy, then add sugar and beat until light and fluffy. Reduce mixer speed and gradually add egg whites; scrape bowl frequently. Stir in milk, sour cream, oil, and vanilla. Fold in sprinkles.

Divide batter evenly between pans. Bake 25 minutes or until a toothpick comes out clean. Cool in pans 15 minutes on a rack, then invert and cool completely.

In a large bowl, beat cream cheese and butter until smooth. Gradually add powdered sugar, beat until fluffy, then mix in salt and milk to reach spreadable consistency.

If desired, slice each cake layer in half horizontally to create four layers. Spread frosting evenly between layers, stack, and finish frosting the top and sides. Press sprinkles onto the sides of the cake, and pile on more sprinkles on top

Chill assembled cake 15–30 minutes to set before slicing (optional but helpful).

  • Prep Time: 30 minutes
  • Cook Time: 30 minutes
  • Category: Dessert